I was in a futuristic city high rise when suddenly a giant star like a cookie cutter banged against one of the full-sized glass windows in front of me. It came back and banged again. Clearly, it was up to something bad as it tried to to break through.

Finally it did, but then it left. I raised my hand in salute, which made it return and crash against the glass that was still there. Every time I made a gesture of thanks, it returned and banged again.

I couldn’t stop myself.